System for the radio transmission of real-time airline flight information

ABSTRACT

A flight delivery system that utilizes an architectural structure and network that allows real-time digital signals to be stored, retrieved and converted to an audio signal for radio transmission to achieve nearly instantaneous transmission of real-time data. The system, utilizes a computerized reservation system as a source of information and stores it on a database. The information is called up by a computer that converts the data to a digital audio signal. The digital audio signal is then broadcast over airport antennae. The system features programs that allow for a conversion from airport city codes to the common identification for local cities.

This application claims benefit of Provisional Application Ser. No. 60/038,884 filed Feb. 20, 1997.

TECHNICAL FIELD OF THE INVENTION

The present invention relates to an improved information delivery system and, more specifically, to an architecture and network that allows real time digital signals to be stored, retrieved and converted to an audio signal for radio transmission to achieve the nearly instantaneous transmission of real-time data.

BACKGROUND OF THE INVENTION

Without limiting the scope of the invention, the present invention relates to a network for gathering data and translating the data into a user-friendly format for transmission over a user-friendly medium. In such networks, emphasis is heavily placed on the accuracy of the information, the timeliness in the delivery of the information and the mode of the delivery of the information.

In the field pertaining to this invention, the transmitted data is airline flight arrival and departure information. In the history of scheduled passenger air transportation, it has always been a goal to get flight arrival and departure information to the public in as an efficient method as possible. In the beginning days of scheduled passenger flight, this information was generally delivered by voice and written word. Passengers would call or, if at the airport, ask an agent of the airline the time of departure or arrival of a particular flight. The information would be available either by the spoken word or a sign located within the confines of an airport.

Since that time and continuing to today, the passenger still gets the information the same way. Through the spoken word or through the written word. What has changed tremendously is the way the information is gathered and distributed. In the early days, the scheduling information was set by the airline and then distributed in schedule books.

This prior system did not address scheduling changes that occurred after the schedule book was printed. Changes could occur for any number of reasons, including delays due to weather, mechanical problems or because of changes in an airline's overall flight system.

The passengers would not be made aware of these changes until they entered the airport. The duty to inform the passengers fell to the agent at the airport. Overall, the prior manual system was a very inefficient system.

As time went on, technology began to introduce changes in the way information was gathered and distributed. With the advent of the Semi-Automated Business Research Environment (SABRE), airlines began to have a tool at their disposal that allowed them to gather information more efficiently. Today, SABRE, a computerized reservation service (CRS), and other CRS', such as Covia, Worldspan and Apollo, collect and disburse information regarding not only passenger reservation information but also flight information. These CRS' enable information to be more timely disbursed over a wide geographic area almost instantaneously. Today that geographic area includes the entire world.

Today's methods of conveying the scheduled flight information to passengers, include automated telephone flight information services, e-mail, facsimile, use of television screens at airports along with public address systems at individual gates. There are video monitors placed inside the airport structures. Airports also have public address systems that are used to announce the most timely of information, flight cancellations, gate changes, explanations for other nonscheduled events. Large signs have been erected at some airports that provide flight information to people entering the airports. These signs have diminished value during inclement weather because visibility is poor, making it difficult for the visiting airport person to read.

Accordingly, today there are various overlays of ways flight information is delivered to the airport visitor.

In the case of various large airports where there may be more than one airport terminal, an improved system for providing flight information prior to entering the airport facilities is needed.

The instant invention gathers flight information from a variety of sources, both human and computer, and converts it to a user-friendly audio signal, then transmits it to the airport visitor's automobile via radio frequencies for reception in the airport visitor's automobile. In this way, real-time information is delivered timely, accurately and in a user-friendly medium. Radio reception is not affected by weather conditions except in the most extreme of conditions. Therefore, the airport visitor has the information needed to determine where they need to go to either take or meet a flight. The radio signal is strong enough that it will reach the airport visitor's automobile prior to arriving at the airport in most instances, further providing ease of use.

SUMMARY OF THE INVENTION

The present invention is an improved flight information collection and delivery system that provides real-time information in a user-friendly format. The invention offers the advantage of delivering real-time information to the airport visitor prior to entering the airport terminal in a way that is timely, accurate and largely independent of environmental factors.

It is a primary advantage of the present invention to provide real-time flight information to airport visitors. This is accomplished by connecting input from a variety of sources to a virtual network. As information is gathered about a specific flight, it is fed through a network to a computerized network. The information may include expected time of arrival, departure times, flight number, gate information, etc. The computer network is a computerized reservation system (CRS). The flight information is gathered by the CRS as part of its normal operations. It is converted into a computer language that allows it to be processed by the computer and then used to do a variety of functions, including scheduling flights, assigning crews, keeping updated information on weather, etc.

The present invention takes this raw data in its computer language form and retrieves arrival and departure information. It should be noted that this information is the most current and comprehensive information that can be obtained about a particular flight. This information is taken from the CRS and stored on a file server. A personal computer, p.c., then accesses the file server on a periodic basis. It takes the information, retrieves and transmits it to a second p.c. that converts the computer language into a form that permits audio reception on radios. The signal is broadcast via a radio transmitter to the airport visitor. In this way, the airport visitor receives the most current information in a convenient and timely manner.

Another advantage of this invention is that the system will reboot itself, without human intervention and the reboot will be virtually invisible to the ultimate user. By utilizing a particular memory location and placing a bit where one was not before, the system will automatically recognize when the bit is missing. The bite will be missing when the system is not receiving information from the data storage on the file server. Monitoring the location is a background task. The background task will read that that location is empty and force a hard reading.

For a more complete understanding of the present invention, including its features and advantages, reference is now made to the following detailed description, taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings:

FIG. 1 is a high level block diagram of a network according to one aspect of this invention;

FIG. 2 is a high level block diagram of the equipment that receives the data through to the transmission; and

FIG. 3 is a high level block flow chart of the steps the system undertakes to present the information.

DETAILED DESCRIPTION OF THE INVENTION

In the following detailed description, a user shall mean and encompass a single user, a plurality of users or anyone of a plurality of users. The word "user" shall be used to mean anyone using an airport facility. Also, a node shall be understood to mean an entry point into a network, a network element, server or other designated point of access. Other similar connotations shall be obvious to those skilled in the art upon reference to this disclosure.

In FIG. 1, the flight information network is shown and generally denoted as 5. Flight information network 5 is a network connected to a variety of flight information sources. The information enters through various nodes. The nodes consist of output monitors 10, printers 15, computerized reservation system (CRS) 20, and a file server 25 having a database 30. The output monitors 10 are used to output information regarding flight arrivals and departures at various locations from around the world. The flight information is sent to CRS 20 from various sources where it is stored and then transmitted out to the nodes. This information is received at an airport local area network LAN 35.

The information stored in the CRS 20 is delivered to the airport LAN 35 where it is then disbursed to various nodes. These nodes may include the monitors 10, the printers 15 and other output devices.

The present invention is a part of, and accesses, the LAN 35 to retrieve the information it needs to broadcast to the airport visitor. As previously mentioned, the LAN 35 also has a database 30 as part of a file server 25. The database 30 also captures the flight information received from the CRS 20 and culls it out from the other information. The information is held here until it is called up by personal computer 45. It is the role of personal computer 45 to receive flight information from the file server 25. Personal computer 45 takes the information retrieved from the file server 25 and converts it to an audio wave file. In the present invention, this is a typical audio wave file as developed by Microsoft. In this process, the soundblaster is initialized. The core of this function is called playwave. It first initializes the soundblaster. Then in the next step it allocates memory to receive the header information. It checks to make sure the digital signal processor is present and functioning properly. The playwave function calls all subsequent functions to the header file to read the wave. The timing loop is also set during this time. The time is set in the file server 25 from input from the CRS 20.

In FIG. 2, a high level block diagram of the equipment that receives the data is shown. Personal computer 45 is configured with a digital signal processor, DSP, which is 100% soundblaster compatible 16, version 4.0 or greater, with a 16 bit DMA access. Such a DSP is manufactured by Creative Labs. It is available royalty free over the Internet and needs slight customization for use with the invention. The necessary modifications are obvious to one skilled in the art.

The database 30 has a spelling disk 50 associated with it. Each airport has a separate and distinct city code associated with it. For example, the airport located between Dallas and Fort Worth is identified by the city code DFW. The city code of the airport at Fresno is FAT. The city code for Chicago's O'HARE field is ORD. Accordingly, one of the things the program must do is to translate the airport name from the city code into an audio wave file the name of the city that is recognizable to the user.

To do this a spelling disk 50 is associated with the local personal computer 45. The spelling disk uses a routine that automatically translates from city code to user language. A separate routine is required for this because the system needs to be able to differentiate between similar city names. For example, when the city San Jose is mentioned, one needs to know if this is San Jose, Calif. or San Jose, Costa Rica. Another example would be Monterrey, Calif. and Monterrey, Nuevo Leon, Mexico.

The same logistics encountered with the real time automated voice response system for flight information occurs here with this system. A person having ordinary skill in the art would be familiar with the work necessary to handle all the nuances that are associated with changing city codes to audible city names. Listed below is the table that is used to convert city code to audible city names.

    ______________________________________                                                 ABE   Allentown-Bethlehem                                                      ABI   Abilene                                                                  ABQ   Albuquerque                                                              ACA   Acapulco                                                                 ACK   Nantucket, MA                                                            ACT   Waco                                                                     ACV   Eureka Arcata CA                                                         AEX   Alexandria LA                                                            AFW   Alliance-Afw                                                             AGP   Malaga                                                                   AKL   Auckland, New Zealand                                                    ALB   Albany                                                                   ALO   Waterloo                                                                 AMA   Amarillo                                                                 ANC   Anchorage                                                                ANU   Antigua                                                                  APF   Naples FL                                                                ARN   Stockholm                                                                ASE   Aspen                                                                    ASU   Asuncion                                                                 ATL   Atlanta                                                                  AUA   Aruba                                                                    AUH   Abu Dhabi                                                                AUS   Austin                                                                   AVL   Asheville                                                                AXA   Anguilla                                                                 AZO   Kalamazoo                                                                BAH   Bahrain, Bahrain                                                         BAQ   Barranquilla                                                             BDA   Bermuda                                                                  BDL   Hartford-Springfield                                                     BFL   Bakersfield                                                              BGI   Barbados                                                                 BHM   Birmingham AL                                                            BHX   Birmingham UK                                                            BJX   Leon Mexico                                                              BMI   Bloomington IL                                                           BNA   Nashville                                                                BOG   Bogota, Colombia                                                         BOI   Boise, Idaho                                                             BOS   Boston                                                                   BPT   Beaumont-Port Arthur                                                     BQK   Brunswick GA                                                             BQN   Aguadilla PR                                                             BRL   Burlington IA                                                            BRU   Brussels, Belgium                                                        BTR   Baton Rouge                                                              BUD   Budapest, Hungary                                                        BUF   Buffalo                                                                  BUR   Burbank                                                                  BWI   Baltimore-Washington                                                     BZE   Belize City, Belize                                                      CAE   Columbia SC                                                              CAK   Akron-Canton                                                             CCS   Caracas                                                                  CGH   Sao Paulo, Brazil                                                        CHA   Chattanooga                                                              CHS   Charleston SC                                                            CIC   Chico CA                                                                 CID   Cedar Rapids-Iowa City                                                   CKB   Clarksburg WV                                                            CLD   Carlsbad CA                                                              CLE   Cleveland                                                                CLL   College Station                                                          CLO   Cali, Colombia                                                           CLT   Charlotte NC                                                             CMH   Columbus OH                                                              CMI   Champaign-Urbana                                                         CNF   Belo Horizonte Brazil                                                    COS   Colorado Springs                                                         CPT   Cape Town                                                                CRP   Corpus Christi                                                           CSG   Columbus GA                                                              CUN   Cancun                                                                   CUR   Curacao, Netherland Anti                                                 CUU   Chihuahua, Mexico                                                        CVG   Cincinnati                                                               CWA   Wausau-Stevens Pt                                                        CZM   Cozumel                                                                  DAB   Daytona Beach                                                            DAY   Dayton                                                                   DBQ   Dubuque                                                                  DCA   Washington-National                                                      DEC   Decatur IL                                                               DEN   Denver                                                                   DFW   Dallas-Ft Worth                                                          DOH   Doha, Qatar                                                              DOM   Dominica                                                                 DRO   Durango Colorado                                                         DSM   Des Moines                                                               DTW   Detroit                                                                  DUS   Dusseldorf                                                               EGE   Vail CO                                                                  EIS   Tortola Beef Island                                                      ELP   El Paso                                                                  ESF   Alexandria                                                               EUG   Eugene OR                                                                EVV   Evansville IN                                                            EWN   New Bern NC                                                              EWR   Newark                                                                   EYW   Key West                                                                 EZE   Buenos Aires, Argentina                                                  FAI   Fairbanks                                                                FAR   Fargo                                                                    FAT   Fresno                                                                   FAY   Fayetteville NC                                                          FDF   Fort De France                                                           FLL   Ft Lauderdale                                                            FLO   Florence SC                                                              FMN   Farmington NM                                                            FMY   Fort Myers                                                               FNT   Flint                                                                    FPO   Freeport, Bahamas                                                        FRA   Frankfurt, Germany                                                       FSD   Sioux Falls                                                              FSM   Ft Smith                                                                 FTW   Fort Worth                                                               FWA   Ft Wayne                                                                 FYV   Fayetteville AR                                                          GCM   Grand Cayman                                                             GDL   Guadalajara, Mexico                                                      GEO   Georgetown, Guyana                                                       GGG   Longview-Kilgore                                                         GGT   George Town                                                              GHB   Governors Hrbr                                                           GIG   Rio De Janeiro                                                           GLA   Glasgow UK                                                               GLS   Galveston, Texas                                                         GND   Grenada                                                                  GPT   Gulfport Biloxi                                                          GRB   Green Bay                                                                GRR   Grand Rapids                                                             GRU   Sao Paulo, Brazil                                                        GSO   Greensboro                                                               GSP   Greenville-Spartanburg                                                   GSW   Ft.worth-Great Southwest                                                 GTR   Columbus-Starkville                                                      GUA   Guatemala City                                                           GUC   Gunnison                                                                 GYE   Guayaquil, Ecuador                                                       HDN   Steamboat Springs                                                        HDQ   Test City                                                                HEL   Helsinki, Finland                                                        HHH   Hilton Head                                                              HKY   Hickory NC                                                               HNL   Honolulu                                                                 HOU   Houston-Hobby                                                            HPN   Westchester Cty                                                          HRL   Harlingen                                                                HSV   Huntsville                                                               HUF   Terre Haute                                                              HUX   Huatulco MX                                                              IAD   Washington-Dulles                                                        IAH   Houston Intercontinental                                                 ICT   Wichita                                                                  IDA   Idaho Falls                                                              IFP   Laughlin-Bullhead City                                                   ILE   Killeen                                                                  ILM   Wilmington NC                                                            IND   Indianapolis                                                             INT   Winston-Salem                                                            ISP   Long Island MacArthur                                                    IYK   Inyokern CA                                                              JAC   Jackson Hole                                                             JAN   Jackson MS                                                               JAX   Jacksonville                                                             JFK   New York-JFK                                                             JNB   Johannesburg                                                             JXN   Jackson MI                                                               KIN   Kingston, Jamaica                                                        LAF   Lafayette IN                                                             LAN   Lansing                                                                  LAS   Las Vegas                                                                LAW   Lawton                                                                   LAX   Los Angeles                                                              LBB   Lubbock                                                                  LCH   Lake Charles                                                             LEX   Lexington                                                                LFT   Lafayette LA                                                             LGA   New York-LGA                                                             LGB   Long Beach                                                               LGW   London-LGW                                                               LHR   London-LHR                                                               LIM   Lima, Peru                                                               LIT   Little Rock                                                              LMT   Klamath Falls                                                            LPB   La Paz, Bolivia                                                          LRD   Laredo                                                                   LRM   Casa De Campo-LRM                                                        LSE   Lacrosse-Winona                                                          LYH   Lynchburga VA                                                            MAD   Madrid, Spain                                                            MAF   Midland-Odessa                                                           MAN   Manchester UK                                                            MAR   Maracaibo                                                                MAZ   Mayaguez, PR                                                             MBJ   Montego Bay, Jamaica                                                     MBS   Saginaw                                                                  MCE   Merced CA                                                                MCI   Kansas City                                                              MCO   Orlando                                                                  MCT   Muscat Oman                                                              MDT   Harrisburg                                                               MDW   Chicago-Midway                                                           MEI   Meridian MS                                                              MEL   Melbourne, Australia                                                     MEM   Memphis                                                                  MEX   Mexico City                                                              MFE   McAllen                                                                  MFR   Medford Oregon                                                           MGA   Managua, Nicaragua                                                       MGM   Montgomery                                                               MHH   Marsh Harbor, Bahamas                                                    MIA   Miami                                                                    MIE   Muncie                                                                   MKE   Milwaukee                                                                MKG   Muskegon MI                                                              MLB   Melbourne FL                                                             MLI   Moline IL                                                                MLU   Monroe                                                                   MOB   Mobile                                                                   MOD   Modesto CA                                                               MQT   Marquette                                                                MRY   Monterey CA                                                              MSN   Madison WI                                                               MSP   Minneapolis-St Paul                                                      MSY   New Orleans                                                              MTH   Marathon FL                                                              MTY   Monterrey, Mexico                                                        MUC   Munich, Germany                                                          MVD   Montevideo, Uruguay                                                      MWX   Mosstown Bahamas                                                         MXP   Milan, Italy                                                             MYR   Myrtle Beach                                                             NAP   Naples FL                                                                NAS   Nassau, Bahamas                                                          NRT   Tokyo-Narita                                                             OAJ   Jacksonville NC                                                          OAK   Oakland                                                                  OGG   Kahului Maui                                                             OKC   Oklahoma City                                                            OMA   Omaha                                                                    ONT   Ontario CA                                                               ORD   Chicago                                                                  ORF   Norfolk                                                                  ORY   Paris, France                                                            OWB   Owensboro KY                                                             OXR   Oxnard                                                                   PAH   Paducah KY                                                               PAP   Port Au Prince                                                           PBI   West Palm Beach                                                          PDX   Portland OR                                                              PGV   Greenville NC                                                            PHF   Newport News                                                             PHL   Philadelphia                                                             PHX   Phoenix                                                                  PIA   Peoria                                                                   PIE   St Petersburg                                                            PIT   Pittsburgh                                                               PLS   Providenciales, Turks                                                    PNS   Pensacola                                                                POP   Puerto Plata, DR                                                         POS   Port Of Spain, Trinidad                                                  POU   Poughkeepsie                                                             PRX   Paris, TX                                                                PSE   Ponce, Pr                                                                PSP   Palm Springs                                                             PTP   Pointe A Pitre                                                           PTY   Panama City                                                              PUJ   Punta Cana, Dr                                                           PVD   Providence                                                               PVR   Puerto Vallarta                                                          RDD   Redding                                                                  RDM   Redmond OR                                                               RDU   Raleigh-Durham                                                           RFD   Rockford IL                                                              RIC   Richmond                                                                 RNO   Reno                                                                     ROA   Roanoke                                                                  ROC   Rochester NY                                                             RST   Rochester MN                                                             RSW   Fort Myers                                                               SAL   San Salvador                                                             SAN   San Diego                                                                SAP   San Pedro Sula                                                           SAT   San Antonio                                                              SAV   Savannah                                                                 SBA   Santa Barbara                                                            SBN   South Bend                                                               SBP   San Luis Obispo                                                          SCC   Deadhorse-Prudhoe Bay AK                                                 SCK   Stockton CA                                                              SCL   Santiago, Chile                                                          SCQ   Sntiago D Cmpst                                                          SDF   Louisville                                                               SDQ   Santo Domingo                                                            SEA   Seattle-Tacoma                                                           SEL   Seoul, Korea                                                             SFB   Sanford FL                                                               SFO   San Francisco                                                            SGF   Springfield MO                                                           SHV   Shreveport                                                               SID   Cape Verde Is                                                            SIN   Singapore                                                                SJC   San Jose, California                                                     SJD   Los Cabos                                                                SJO   San Jose, Costa Rica                                                     SJT   San Angelo                                                               SJU   San Juan                                                                 SKB   St Kitts                                                                 SLC   Salt Lake City                                                           SLU   St Lucia                                                                 SMF   Sacramento                                                               SMX   Santa Maria                                                              SNA   Orange County                                                            SPI   Springfield IL                                                           SPS   Wichita Falls                                                            SRQ   Sarasota                                                                 STL   St Louis                                                                 STS   Santa Rosa, CA                                                           STT   St Thomas, USVI                                                          STX   St Croix, USVI                                                           SUX   Sioux City IA                                                            SVD   St Vincent                                                               SVO   Moscow, Russia                                                           SWF   Newburgh Stewart                                                         SXM   St Maarten                                                               SYD   Sydney, Australia                                                        SYR   Syracuse                                                                 TAM   Tampico                                                                  TCB   Treasure Cay                                                             TCL   Tuscaloosa                                                               TFS   Tenerife                                                                 TGU   Tegucigalpa                                                              TLH   Tallahassee FL                                                           TOL   Toledo                                                                   TPA   Tampa                                                                    TPL   Temple TX                                                                TSS   MidtownManhattan                                                         TUL   Tulsa                                                                    TUS   Tucson                                                                   TVC   Traverse City                                                            TXK   Texarkana                                                                TXL   Berlin                                                                   TYR   Tyler                                                                    TYS   Knoxville                                                                UIO   Quito, Ecuador                                                           UVF   St Lucia                                                                 VIJ   Virgin Gorda                                                             VIS   Visalia                                                                  VLN   Valencia                                                                 VPS   Ft Walton Beach                                                          VRB   Vero Beach, Fl                                                           VVI   Santa Cruz, Bolivia                                                      WAW   Warsaw                                                                   YEG   Edmonton                                                                 YHM   Hamilton, Canada                                                         YHZ   Halifax                                                                  YOW   Ottawa                                                                   YQB   Quebec City                                                              VPS   Ft Walton Beach                                                          VRB   Vero Beach, Fl                                                           VVI   Santa Cruz, Bolivia                                                      WAW   Warsaw                                                                   YEG   Edmonton                                                                 YHM   Hamilton, Canada                                                         YHZ   Halifax                                                                  YOW   Ottawa                                                                   YQB   Quebec City                                                              YUL   Montreal                                                                 YVR   Vancouver BC                                                             YWG   Winnipeg MB                                                              YYC   Calgary                                                                  YYZ   Toronto                                                                  ZIH   Zihuatanejo                                                              ZRH   Zurich, Switzerland                                                      ZRK   Rockford IL                                                              ZSA   San Salvador BH                                                  ______________________________________                                    

The CRS 20 retrieves, stores and dispatches information about every matter concerning a flight. This information includes all take offs and landings. They are reported through the CRS 20 and then the information is dispensed throughout the system. The flight information is retrieved and stored into a database 30. This information is, in turn, be called up for use by the file server 25 in response to periodic requests from personal computer 45.

Because a large amount of information is received from the CRS 20, other information above and beyond arrival and departure times may also be retrieved. These enhancements would include other airline information. For example, the present invention may be used to identify not only the flight arrival time, but also the airline for which the craft is flying.

In another embodiment the present invention may have a continuous loop that periodically repeats the identity of the airline for whom the flight information is being provided.

All of this information is fed into the personal computer 45 where, as stated previously, a wave file is called up to translate the information from machine language into a user-friendly format.

From the personal computer 45, the information is transmitted to an audio plug 55 The audio plug 55 goes directly to a regular telephone circuit 60. The audio plug connects personal computer 45 with the airport network. The circuit may be a dedicated line or part of a vertical network. In the preferred embodiment, it is a part of a dedicated line.

The telephone circuit goes out to an airport LAN 63 shown at FIG. 2. The airport LAN 63 includes a radio transmitter 65 located at the airport. In the preferred embodiment the radio transmitter is a 60 watt transmitter with a broadcast radius of 10 miles. The broadcast is received on a user's radio and the user then audibly hears pertinent information regarding flight arrival and departure.

FIG. 3 is a high level flow chart showing the steps of the software program. In general, the program first loads the software configuration. Then it looks for and connects to the network. From the network, the software locates the file server and transfers flight information into half of a buffer. At the same time, it initializes the soundblaster and wave files and DMA. Next, it sets up the wave file and DSP. The information is then converted to an audio format and then sent to the airport LAN 63 to be sent to an equalizer 70. From the equalizer 70, the information is sent to a transmitter 65 and from there out through airport antennaes 75.

A copy of the source code follows. It is an embodiment of the invention but the invention should not be limited to this code. It is provided as an example. ##SPC1## 

What is claimed is:
 1. A digital signal conversion system for storing, retrieving, and converting real time digital signals to audio signals allowing for subsequent transmission and audio reception, said system comprising:at least one airline computerized reservation system serving as digital source computer; at least one flight information file server communicably attached to the digital source computer; at least one flight information database communicably attached to the flight information file server; at least one data output means in communication with the digital source computer; at least one local airport local area network communicably attached to the flight information file server; at least one signal conversion computer communicably attached to the local airport local area network; at least one signal conversion computer database communicably attached to the signal conversion computer; an audio production capability in communication with the signal conversion computer; a city code differentiation means in communication with the signal conversion computer; an announcement generation means resident within the signal conversion computer; at least one telephone circuit communicably attached to the signal conversion computer; at least one airport location radio transmission local area network in communication with the telephone circuit; at least one equalizer communicably attached to airport location radio transmission local area network; at least one airport location radio transmitter communicably attached to the equalizer; at least one airport location radio antennae communicably attached to the airport location radio transmitter.
 2. The digital signal conversion system in accordance with claim 1 where the data output means is a printer.
 3. The digital signal conversion system in accordance with claim 1 where the data output means is a monitor.
 4. The digital signal conversion system in accordance with claim 1 where the audio production capability data is a personal computer audio plug.
 5. The digital signal conversion system in accordance with claim 1 where the city code differentiation means is a personal computer spelling disk.
 6. The digital signal conversion system in accordance with claim 1 where the telephone circuit is a dedicated line.
 7. The digital signal conversion system in accordance with claim 1 where the telephone circuit is a signal transmission capability within a vertical network.
 8. A digital signal conversion system for storing, retrieving, and converting real time digital signals to audio signals allowing for subsequent transmission and audio reception, said system comprising:at least one airline computerized reservation system serving as a digital source computer; at least one flight information file server communicably attached to the digital source computer; at least one digital source data structure to facilitate communication between the digital source computer and a flight information file server; at least one flight information database communicably attached to the flight information file server; at least one data output means in communication with the digital source computer; at least one local airport local area network communicably attached to the flight information file server; at least one signal conversion computer communicably attached to the local airport local area network; at least one signal conversion computer database communicably attached to the signal conversion computer; at least one flight information data structure to facilitate communication between the flight information file server and the signal conversion computer; an audio production capability in communication with the signal conversion computer; a city code differentiation means in communication with the signal conversion computer; an announcement generation means resident within the signal conversion computer; at least one telephone circuit communicably attached to the signal conversion computer; at least one airport location radio transmission local area network in communication with the telephone circuit; at least one equalizer communicably attached to airport location radio transmission local area network; at least one airport location radio transmitter communicably attached to the equalizer; at least one airport location radio antennae communicably attached to the airport location radio transmitter. 